I am in the process of migrating users from Exchange 2003 to Exchange 2010. We have a routing group connector for Exchange 2003 to 2010 connectivity and for the most part it works fine.
However, all of a sudden emails from 2003 users get delayed to 2010 users out of nowhere...the Queue gets large and we see delays for 1-2 hours. No action is taken and they eventually get delivered.
What should I do to troubleshoot this issue?
